Wirelessly posted (iPhone 4: Mozilla/5.0 (iPhone; CPU iPhone OS 5_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B176 Safari/7534.48.3)
They use one of those juniper firewall at cabin to filter out games and craps like that. But that provider algorithm / listing is not known to be the best. (or in other words, false positive happens quite frequently)